Ratchet-drill



(No Model.)

M. ROTHFUS'S. RATGHET DRILL.

No.352,'266. Patented Nov-9,1886.

lllllll lllhlll a NITED STATES PATENT OFFICE.

MICHAEL ROTHFUSS, OF WILLIAMSPORT, PENNSYLVANIA.

RATCH ET-DRlLL..

SPECIFICATION forming part of Letters Patent No. 352,266, dated November9, 1886.

Application filed August 16, 1886. Serial No. 21l.0-20.

To all whom it may concern.-

Be it known that I,'MIOHAEL ROTHFUSS, a citizen of the United States,residing in the city of \Villiamsport, in the county of Lycoming andState of Pennsylvania, have invented a new and useful Improvement inRatchet Hand-Drills, of which the following is a specification.

My invention relates to hand drilling machines in which the drill iscaused to turn by means of a ratchet or ratchets propelled by a leveroperated by the hand; and the objects of my improvements are, first, toproduce a continuous forward turning of the drill without the lostmotion ordinarily required to bring back and reset the ratchet, thusgaining time and elficiency in the machine; second, to produce aninstrument that is more readily adapted to be used in corners and othersituations where obstructions prevent the free use of other drills. lattain these objects by the mechanism illustrated in the accompanyingdrawings, in which- Figurel is a top view of the instrument. Fig. 2 isthe obverse or bottom view of the same, and Fig. 3 is a side View of oneof the ratchets and some of the accompanying parts.

B is the drill-holder and body of the instrument, provided with aset-screw for holding the drill in place. Around B, fitting in a shallowgroove to prevent sliding or lateral movement, is a sleeve, L, withinwhich B freely revolves. Surrounding and immovably' lastened upon B aretwo ratchet'wheels, (Z d, one on each side of the sleeve L and a shortdistance therefrom. Playing upon said wheels are two ratchet-bars, c c,which have a reciprocating motion in their respective paths formed bythe guides K K. The ratchet-bars c 0 are kept in proper contact withtheir corresponding wheels, d d, by a double spring, S, fastened at itscenter by a screw into the sleeve L. A lever or handle, A, is pivoted tothe sleeve L at the point 73, giving said handle a back ward and forwardmotion in the direction of the line of the drill, and also, at the willof (No model.)

the operator, a side motion in connection with the sleeve L around B.

The handle A, at or near the end pivoted T at i, is provided with twocorresponding lateral projections or arms, n n, to each of which one endof the ratchet-bars c c is respectively pivoted by the bolts orpivotsff. To prevent binding, which would result from fixed pivots at fsaid ratchet-bars are provided with lateral slots at the point where sopivoted, permitting a side'motion or play therein of the bolts f 1'. Bythis mechanism I obtain a forward motion or turning of the drill by eachof the two ratchets, the one recovering itsflost motion while the otheris driving the drill, thus giving twice the efficiency of the ordinaryratchet-dril l.

w The motion of the handle or lever being in a line with the directionof the drill enables the operator, when drilling in a corner or narrowspace, to adapt his instrument to the location and obtain a free motionof the lever, where the operation of other drills would be greatlyhampered. Should it, because of obstructions or for any reason, bedesirable to employ a lateral motion, as in the ordinary ratchet-drill,this instrument may be so operated, in that case acting as. a singleratchetdrill, and the handle may be so worked in a position either atright angles to the drill or at any angle within the range of itsforward and backward movement.

- I do not claim as my invention any of the mechanical devices hereinemployed of themselves; but

-What I claim,'and desire to secure by Letters Patent, is

The drill-holder B, construct-ed wit-h two ratchet-wheels, d d, andtit-ted with a sleeve, L, in combination with the ratchet-bars c c,operated by the lever A, substantially as described. I

MICHAEL ROTHFUSS.

\Vitnesses:

ADAM RoTHFUss, I LEWIS WELKER.

